From: Catalin Marinas <catalin.marinas@arm.com>
To: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Cc: Mark Rutland <mark.rutland@arm.com>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
Eric Anholt <eric@anholt.net>, Rob Herring <robh+dt@kernel.org>,
bcm-kernel-feedback-list@broadcom.com,
Stefan Wahren <wahrenst@gmx.net>,
linux-arm-kernel@lists.infradead.org,
linux-rpi-kernel@lists.infradead.org
Subject: Re: [PATCH v3 1/2] ARM: dts: bcm2711: force CMA into first GB of memory
Date: Thu, 7 Nov 2019 11:20:20 +0000 [thread overview]
Message-ID: <20191107112020.GA16965@arrakis.emea.arm.com> (raw)
In-Reply-To: <20191107095611.18429-2-nsaenzjulienne@suse.de>
Hi Nicolas,
On Thu, Nov 07, 2019 at 10:56:10AM +0100, Nicolas Saenz Julienne wrote:
> diff --git a/arch/arm/boot/dts/bcm2711.dtsi b/arch/arm/boot/dts/bcm2711.dtsi
> index ac83dac2e6ba..667658497898 100644
> --- a/arch/arm/boot/dts/bcm2711.dtsi
> +++ b/arch/arm/boot/dts/bcm2711.dtsi
> @@ -12,6 +12,26 @@
>
> interrupt-parent = <&gicv2>;
>
> + reserved-memory {
> + #address-cells = <2>;
> + #size-cells = <1>;
> + ranges;
> +
> + /*
> + * arm64 reserves the CMA by default somewhere in ZONE_DMA32,
> + * that's not good enough for bcm2711 as some devices can
> + * only address the lower 1G of memory (ZONE_DMA).
> + */
> + linux,cma {
> + compatible = "shared-dma-pool";
> + size = <0x2000000>; /* 32MB */
> + alloc-ranges = <0x0 0x00000000 0x40000000>;
> + reusable;
> + linux,cma-default;
> + };
> + };
> +
> +
> soc {
> /*
> * Defined ranges:
Sorry, I just realised I can't merge this as it depends on a patch
that's only in -next: 7dbe8c62ceeb ("ARM: dts: Add minimal Raspberry Pi
4 support").
I'll queue the second patch in the series to fix the regression
introduces by the ZONE_DMA patches and, AFAICT, the dts update can be
queued independently.
--
Catalin
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next prev parent reply other threads:[~2019-11-07 11:20 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-07 9:56 [PATCH v3 0/2] arm64: Fix CMA/crashkernel reservation Nicolas Saenz Julienne
2019-11-07 9:56 ` [PATCH v3 1/2] ARM: dts: bcm2711: force CMA into first GB of memory Nicolas Saenz Julienne
2019-11-07 11:20 ` Catalin Marinas [this message]
2019-11-07 17:59 ` Florian Fainelli
2019-11-07 19:09 ` Stefan Wahren
2019-11-14 20:35 ` Florian Fainelli
2019-11-15 9:02 ` Nicolas Saenz Julienne
2019-11-07 9:56 ` [PATCH v3 2/2] arm64: mm: reserve CMA and crashkernel in ZONE_DMA32 Nicolas Saenz Julienne
2021-03-22 18:34 ` Jon Masters
2021-03-22 18:40 ` Jon Masters
2021-03-22 18:48 ` Nicolas Saenz Julienne
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